------------------------------------------------------ CALL FOR PROPOSALS FOR BEAMTIME WITH ONLINE MICROSPEC
*Proposal Deadline 13th of January 2010*There will be beamtime available at the ESRF for MX data collection with a setup that allows online monitoring of UV/VIS spectral changes of the crystal during the X-ray diffraction experiment. Users who are interested in using this beam time (including those who are members of BAG Groups) should use the following mechanism: http://www.esrf.fr/UsersAndScience/UserGuide/Applying/ProposalGuidelines/MXnon-BAGproposal and it must be clearly indicated in the title of the proposal form that the online monitoring of spectral changes is necessary for the project.
A brief description of the device is given below. However, Users are encouraged to consult the web pages for detailed information: http://www.esrf.fr/UsersAndScience/Experiments/MX/How_to_use_our_beamlines/Run_Your_Experiment/Microspectrophotometer_User_Guide
As this is not a standard setup, it might take a significant amount of time to train users, align the device, and analyze the data in order to derive relevant data collection schemes. We will therefore schedule 24 hours for each project. The deadline for this specific application is 13th of January 2010.
It is strongly recommended to record beforehand an absorption (fluorescence) spectrum of the crystal on a home microspectrophotometer such as the 4dx one, or at an off-line facility such as the ESRF Cryobench, and to provide it in the application form. Such a spectrum would greatly help to determine the feasibility of the experiment. For optimal experimental conditions, crystals should be frozen in minimal amounts of cryosolution, especially when the crystals are small. Finally, please note that the ESRF sample changer cannot be operated at the same time as the on-line microspec.
++++++++++++ *Dates of beam-time: 19th to 22nd of February 2010 *Storage Uniform Filling (200mA) Beamline: ID14-2 Energy: 13.29 keV Specifications: UV/VIS-range: 250 - 1100 nm ODmax: 2 - 2.5 Minimum integration time: 50 ms Light source: Mikropack DH-2000-BAL (Deuterium/Halogen) Monitoring light focal spot diameter: 0.03 (min) - 0.15 mm (max) Sampling freq (to disk): 10Hz or lower
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